Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

Manganese ferrite graphene nanocomposite synthesis and the investigation of its antibacterial properties for water treatment purposes

The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning ele...

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Bibliographic Details
Published in:Revista ambiente & água Vol. 15; no. 4; pp. 1 - 12
Main Authors: Soletti, Lara De Souza, Ferreira, Maria Eliana Camargo, Kassada, Alex Toshio, Abreu Filho, Benício Alves de, Bergamasco, Rosangela, Yamaguchi, Natália Ueda
Format: Journal Article
Language:English
Published: Taubaté Instituto de Pesquisas Ambientais em Bacias Hidrográficas 2020
Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
Subjects:
Antibacterial activity
Antibiotics
antimicrobial
Cytotoxicity
Dispersion
Drinking water
E coli
Electron microscopy
ENGINEERING, ENVIRONMENTAL
Escherichia coli
Ferrites
Graphene
magnetic
Manganese
Nanocomposites
Nanomaterials
nanoparticle
Nanoparticles
Oxidative stress
Pathogens
Physical characteristics
Room temperature
Scanning electron microscopy
Transmission electron microscopy
Water treatment
antimicrobial
magnetic
nanoparticle
magnético
nanopartícula
antimicrobiano
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Summary:The main objective of this study was to synthesize a nanocomposite using graphene and manganese ferrite nanoparticles (MnFe2O4-G) and to evaluate its antibacterial activity for water treatment purposes. Its morphological characteristics were evaluated by instrumental techniques, such as scanning electron microscopy and transmission electron microscopy. The characterization results indicated that the nanocomposite presented nanoparticles of approximately 25 nm well dispersed in transparent and large (14 μm) graphene nanosheets. The antibacterial activity was evaluated in a batch experiment using a concentration of 40 μg mL-1 of nanocomposite (MnFe2O4-G, bare MnFe2O4 nanoparticles or graphene oxide), 1x105 CFU mL-1 of Escherichia coli, and 8 h of contact time at room temperature. The highest antibacterial capacity was observed for the hybrid nanocomposite (91.91%), due to the synergic effect of graphene and MnFe2O4 nanoparticles. Various mechanisms were proposed to explain the effective antibacterial activity of MnFe2O4-G, such as wrapping, oxidative stress, sharp-edge cutting effect, among others. The results showed that MnFe2O4-G is a potential alternative in water treatment processes as an antibacterial agent.
ISSN:1980-993X
1980-993X
DOI:10.4136/ambi-agua.2515